550397 has 4 divisors (see below), whose sum is σ = 552000. Its totient is φ = 548796.

The previous prime is 550379. The next prime is 550427. The reversal of 550397 is 793055.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 793055 = 5 ⋅158611.

It is a cyclic number.

It is not a de Polignac number, because 550397 - 2¹⁴ = 534013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53 + ... + 1050.

It is an arithmetic number, because the mean of its divisors is an integer number (138000).

2⁵⁵⁰³⁹⁷ is an apocalyptic number.

It is an amenable number.

550397 is a deficient number, since it is larger than the sum of its proper divisors (1603).

550397 is a wasteful number, since it uses less digits than its factorization.

550397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1602.

The product of its (nonzero) digits is 4725, while the sum is 29.

The square root of 550397 is about 741.8874577724. The cubic root of 550397 is about 81.9518356851.

The spelling of 550397 in words is "five hundred fifty thousand, three hundred ninety-seven".